In the darkness of space, invisible energy fills the vast regions between the stars. This video sheds light on intergalactic radio waves, microwaves, X-rays, deadly gamma rays, and other forms of energy not visible to the naked eye. Information on technology for seeing the invisible universe such as the Very Large Array radio telescope, the Infrared Astronomical Satellite, the Compton Gamma Ray Observatory, the Hubble Space Telescope, and the Chandra and Newton X-ray Observatories will give students a new view of the “emptiness” of space. A viewable/printable instructor’s guide is available online. Correlates to National Science Education Standards, National Educational Technology Standards, and standards of the Association for the Advancement of Science. A Cambridge Educational Production. (24 minutes)